The Doctor pursed his lips slightly, as if tasting something sour. He didn't like the Master's attitude in the least, and more disquietingly, he wasn't entirely certain why.

Perhaps it was the implied condescension, one he couldn't really protest without impugning his future self, and he should hope he'd have learned many new things in the future. That didn't mean it wasn't very irritating in the here and now.

"Well, that's certainly something there never seems to be any shortage off," the Doctor said, voice sharpened by the frustration of not being able to reach all the information available and needed to understand the situation. He was heartily tired of that feeling.